diff --git a/.phpstan-dba-mysqli.cache b/.phpstan-dba-mysqli.cache
index d8aaabbad..3d641c82a 100644
--- a/.phpstan-dba-mysqli.cache
+++ b/.phpstan-dba-mysqli.cache
@@ -3,6 +3,207 @@
   'schemaHash' => '978ac93a0dacd29d0a93b7827aa3319c',
   'records' => 
   array (
+    'SELECT
+                    coalesce(COLUMN_NAME, "") as COLUMN_NAME,
+                    coalesce(EXTRA, "") as EXTRA,
+                    COLUMN_TYPE
+                 FROM information_schema.columns
+                 WHERE table_name = \'1970-01-01\' AND table_schema = DATABASE()' => 
+    array (
+      'result' => 
+      array (
+        5 => 
+        PHPStan\Type\Constant\ConstantArrayType::__set_state(array(
+           'keyType' => 
+          PHPStan\Type\UnionType::__set_state(array(
+             'sortedTypes' => true,
+             'cachedDescriptions' => 
+            array (
+              2 => '0|1|2|\'COLUMN_NAME\'|\'COLUMN_TYPE\'|\'EXTRA\'',
+              1 => 'int|string',
+            ),
+             'types' => 
+            array (
+              0 => 
+              PHPStan\Type\Constant\ConstantIntegerType::__set_state(array(
+                 'value' => 0,
+              )),
+              1 => 
+              PHPStan\Type\Constant\ConstantIntegerType::__set_state(array(
+                 'value' => 1,
+              )),
+              2 => 
+              PHPStan\Type\Constant\ConstantIntegerType::__set_state(array(
+                 'value' => 2,
+              )),
+              3 => 
+              PHPStan\Type\Constant\ConstantStringType::__set_state(array(
+                 'objectType' => NULL,
+                 'arrayKeyType' => 
+                PHPStan\Type\Constant\ConstantStringType::__set_state(array(
+                   'objectType' => NULL,
+                   'arrayKeyType' => 
+                  PHPStan\Type\Constant\ConstantStringType::__set_state(array(
+                     'objectType' => NULL,
+                     'arrayKeyType' => NULL,
+                     'value' => 'COLUMN_NAME',
+                     'isClassString' => false,
+                  )),
+                   'value' => 'COLUMN_NAME',
+                   'isClassString' => false,
+                )),
+                 'value' => 'COLUMN_NAME',
+                 'isClassString' => false,
+              )),
+              4 => 
+              PHPStan\Type\Constant\ConstantStringType::__set_state(array(
+                 'objectType' => NULL,
+                 'arrayKeyType' => 
+                PHPStan\Type\Constant\ConstantStringType::__set_state(array(
+                   'objectType' => NULL,
+                   'arrayKeyType' => 
+                  PHPStan\Type\Constant\ConstantStringType::__set_state(array(
+                     'objectType' => NULL,
+                     'arrayKeyType' => NULL,
+                     'value' => 'COLUMN_TYPE',
+                     'isClassString' => false,
+                  )),
+                   'value' => 'COLUMN_TYPE',
+                   'isClassString' => false,
+                )),
+                 'value' => 'COLUMN_TYPE',
+                 'isClassString' => false,
+              )),
+              5 => 
+              PHPStan\Type\Constant\ConstantStringType::__set_state(array(
+                 'objectType' => NULL,
+                 'arrayKeyType' => 
+                PHPStan\Type\Constant\ConstantStringType::__set_state(array(
+                   'objectType' => NULL,
+                   'arrayKeyType' => 
+                  PHPStan\Type\Constant\ConstantStringType::__set_state(array(
+                     'objectType' => NULL,
+                     'arrayKeyType' => NULL,
+                     'value' => 'EXTRA',
+                     'isClassString' => false,
+                  )),
+                   'value' => 'EXTRA',
+                   'isClassString' => false,
+                )),
+                 'value' => 'EXTRA',
+                 'isClassString' => false,
+              )),
+            ),
+             'normalized' => false,
+          )),
+           'itemType' => 
+          PHPStan\Type\StringType::__set_state(array(
+          )),
+           'allArrays' => NULL,
+           'nextAutoIndexes' => 
+          array (
+            0 => 3,
+          ),
+           'keyTypes' => 
+          array (
+            0 => 
+            PHPStan\Type\Constant\ConstantStringType::__set_state(array(
+               'objectType' => NULL,
+               'arrayKeyType' => 
+              PHPStan\Type\Constant\ConstantStringType::__set_state(array(
+                 'objectType' => NULL,
+                 'arrayKeyType' => 
+                PHPStan\Type\Constant\ConstantStringType::__set_state(array(
+                   'objectType' => NULL,
+                   'arrayKeyType' => NULL,
+                   'value' => 'COLUMN_NAME',
+                   'isClassString' => false,
+                )),
+                 'value' => 'COLUMN_NAME',
+                 'isClassString' => false,
+              )),
+               'value' => 'COLUMN_NAME',
+               'isClassString' => false,
+            )),
+            1 => 
+            PHPStan\Type\Constant\ConstantIntegerType::__set_state(array(
+               'value' => 0,
+            )),
+            2 => 
+            PHPStan\Type\Constant\ConstantStringType::__set_state(array(
+               'objectType' => NULL,
+               'arrayKeyType' => 
+              PHPStan\Type\Constant\ConstantStringType::__set_state(array(
+                 'objectType' => NULL,
+                 'arrayKeyType' => 
+                PHPStan\Type\Constant\ConstantStringType::__set_state(array(
+                   'objectType' => NULL,
+                   'arrayKeyType' => NULL,
+                   'value' => 'EXTRA',
+                   'isClassString' => false,
+                )),
+                 'value' => 'EXTRA',
+                 'isClassString' => false,
+              )),
+               'value' => 'EXTRA',
+               'isClassString' => false,
+            )),
+            3 => 
+            PHPStan\Type\Constant\ConstantIntegerType::__set_state(array(
+               'value' => 1,
+            )),
+            4 => 
+            PHPStan\Type\Constant\ConstantStringType::__set_state(array(
+               'objectType' => NULL,
+               'arrayKeyType' => 
+              PHPStan\Type\Constant\ConstantStringType::__set_state(array(
+                 'objectType' => NULL,
+                 'arrayKeyType' => 
+                PHPStan\Type\Constant\ConstantStringType::__set_state(array(
+                   'objectType' => NULL,
+                   'arrayKeyType' => NULL,
+                   'value' => 'COLUMN_TYPE',
+                   'isClassString' => false,
+                )),
+                 'value' => 'COLUMN_TYPE',
+                 'isClassString' => false,
+              )),
+               'value' => 'COLUMN_TYPE',
+               'isClassString' => false,
+            )),
+            5 => 
+            PHPStan\Type\Constant\ConstantIntegerType::__set_state(array(
+               'value' => 2,
+            )),
+          ),
+           'valueTypes' => 
+          array (
+            0 => 
+            PHPStan\Type\StringType::__set_state(array(
+            )),
+            1 => 
+            PHPStan\Type\StringType::__set_state(array(
+            )),
+            2 => 
+            PHPStan\Type\StringType::__set_state(array(
+            )),
+            3 => 
+            PHPStan\Type\StringType::__set_state(array(
+            )),
+            4 => 
+            PHPStan\Type\StringType::__set_state(array(
+            )),
+            5 => 
+            PHPStan\Type\StringType::__set_state(array(
+            )),
+          ),
+           'optionalKeys' => 
+          array (
+          ),
+           'isList' => false,
+        )),
+      ),
+    ),
     'SELECT
                 MD5(
                     GROUP_CONCAT(
@@ -270,6 +471,78 @@
         )),
       ),
     ),
+    'SELECT
+        CASE
+            WHEN freigabe1u1 > 50 THEN \'big-one\'
+            WHEN freigabe1u1 = 50 THEN \'normal\'
+            ELSE freigabe1u1
+        END as val from ada' => 
+    array (
+      'result' => 
+      array (
+        5 => 
+        PHPStan\Type\Constant\ConstantArrayType::__set_state(array(
+           'keyType' => 
+          PHPStan\Type\UnionType::__set_state(array(
+             'sortedTypes' => true,
+             'cachedDescriptions' => 
+            array (
+              2 => '0|\'val\'',
+            ),
+             'types' => 
+            array (
+              0 => 
+              PHPStan\Type\Constant\ConstantIntegerType::__set_state(array(
+                 'value' => 0,
+              )),
+              1 => 
+              PHPStan\Type\Constant\ConstantStringType::__set_state(array(
+                 'objectType' => NULL,
+                 'arrayKeyType' => NULL,
+                 'value' => 'val',
+                 'isClassString' => false,
+              )),
+            ),
+             'normalized' => false,
+          )),
+           'itemType' => 
+          PHPStan\Type\StringType::__set_state(array(
+          )),
+           'allArrays' => NULL,
+           'nextAutoIndexes' => 
+          array (
+            0 => 1,
+          ),
+           'keyTypes' => 
+          array (
+            0 => 
+            PHPStan\Type\Constant\ConstantStringType::__set_state(array(
+               'objectType' => NULL,
+               'arrayKeyType' => NULL,
+               'value' => 'val',
+               'isClassString' => false,
+            )),
+            1 => 
+            PHPStan\Type\Constant\ConstantIntegerType::__set_state(array(
+               'value' => 0,
+            )),
+          ),
+           'valueTypes' => 
+          array (
+            0 => 
+            PHPStan\Type\StringType::__set_state(array(
+            )),
+            1 => 
+            PHPStan\Type\StringType::__set_state(array(
+            )),
+          ),
+           'optionalKeys' => 
+          array (
+          ),
+           'isList' => false,
+        )),
+      ),
+    ),
     'SELECT
                     coalesce(COLUMN_NAME, "") as COLUMN_NAME,
                     coalesce(EXTRA, "") as EXTRA,
@@ -2511,6 +2784,73 @@
         )),
       ),
     ),
+    'SELECT IFNULL(MAX(eladaid),0)+1 as priority from ak' => 
+    array (
+      'result' => 
+      array (
+        5 => 
+        PHPStan\Type\Constant\ConstantArrayType::__set_state(array(
+           'keyType' => 
+          PHPStan\Type\UnionType::__set_state(array(
+             'sortedTypes' => true,
+             'cachedDescriptions' => 
+            array (
+              2 => '0|\'priority\'',
+            ),
+             'types' => 
+            array (
+              0 => 
+              PHPStan\Type\Constant\ConstantIntegerType::__set_state(array(
+                 'value' => 0,
+              )),
+              1 => 
+              PHPStan\Type\Constant\ConstantStringType::__set_state(array(
+                 'objectType' => NULL,
+                 'arrayKeyType' => NULL,
+                 'value' => 'priority',
+                 'isClassString' => false,
+              )),
+            ),
+             'normalized' => false,
+          )),
+           'itemType' => 
+          PHPStan\Type\IntegerType::__set_state(array(
+          )),
+           'allArrays' => NULL,
+           'nextAutoIndexes' => 
+          array (
+            0 => 1,
+          ),
+           'keyTypes' => 
+          array (
+            0 => 
+            PHPStan\Type\Constant\ConstantStringType::__set_state(array(
+               'objectType' => NULL,
+               'arrayKeyType' => NULL,
+               'value' => 'priority',
+               'isClassString' => false,
+            )),
+            1 => 
+            PHPStan\Type\Constant\ConstantIntegerType::__set_state(array(
+               'value' => 0,
+            )),
+          ),
+           'valueTypes' => 
+          array (
+            0 => 
+            PHPStan\Type\IntegerType::__set_state(array(
+            )),
+            1 => 
+            PHPStan\Type\IntegerType::__set_state(array(
+            )),
+          ),
+           'optionalKeys' => 
+          array (
+          ),
+           'isList' => false,
+        )),
+      ),
+    ),
     'SELECT a.email, b.adaid FROM ada a LEFT JOIN ada b ON a.adaid=b.adaid' => 
     array (
       'result' => 
@@ -4446,6 +4786,213 @@
         )),
       ),
     ),
+    'SELECT column_name, column_default, is_nullable
+                FROM information_schema.columns
+                WHERE table_name = \'1970-01-01\'' => 
+    array (
+      'result' => 
+      array (
+        5 => 
+        PHPStan\Type\Constant\ConstantArrayType::__set_state(array(
+           'keyType' => 
+          PHPStan\Type\UnionType::__set_state(array(
+             'sortedTypes' => true,
+             'cachedDescriptions' => 
+            array (
+              2 => '0|1|2|\'COLUMN_DEFAULT\'|\'COLUMN_NAME\'|\'IS_NULLABLE\'',
+              1 => 'int|string',
+            ),
+             'types' => 
+            array (
+              0 => 
+              PHPStan\Type\Constant\ConstantIntegerType::__set_state(array(
+                 'value' => 0,
+              )),
+              1 => 
+              PHPStan\Type\Constant\ConstantIntegerType::__set_state(array(
+                 'value' => 1,
+              )),
+              2 => 
+              PHPStan\Type\Constant\ConstantIntegerType::__set_state(array(
+                 'value' => 2,
+              )),
+              3 => 
+              PHPStan\Type\Constant\ConstantStringType::__set_state(array(
+                 'objectType' => NULL,
+                 'arrayKeyType' => 
+                PHPStan\Type\Constant\ConstantStringType::__set_state(array(
+                   'objectType' => NULL,
+                   'arrayKeyType' => NULL,
+                   'value' => 'COLUMN_DEFAULT',
+                   'isClassString' => false,
+                )),
+                 'value' => 'COLUMN_DEFAULT',
+                 'isClassString' => false,
+              )),
+              4 => 
+              PHPStan\Type\Constant\ConstantStringType::__set_state(array(
+                 'objectType' => NULL,
+                 'arrayKeyType' => 
+                PHPStan\Type\Constant\ConstantStringType::__set_state(array(
+                   'objectType' => NULL,
+                   'arrayKeyType' => NULL,
+                   'value' => 'COLUMN_NAME',
+                   'isClassString' => false,
+                )),
+                 'value' => 'COLUMN_NAME',
+                 'isClassString' => false,
+              )),
+              5 => 
+              PHPStan\Type\Constant\ConstantStringType::__set_state(array(
+                 'objectType' => NULL,
+                 'arrayKeyType' => 
+                PHPStan\Type\Constant\ConstantStringType::__set_state(array(
+                   'objectType' => NULL,
+                   'arrayKeyType' => NULL,
+                   'value' => 'IS_NULLABLE',
+                   'isClassString' => false,
+                )),
+                 'value' => 'IS_NULLABLE',
+                 'isClassString' => false,
+              )),
+            ),
+             'normalized' => false,
+          )),
+           'itemType' => 
+          PHPStan\Type\UnionType::__set_state(array(
+             'sortedTypes' => true,
+             'cachedDescriptions' => 
+            array (
+              1 => 'string|null',
+            ),
+             'types' => 
+            array (
+              0 => 
+              PHPStan\Type\StringType::__set_state(array(
+              )),
+              1 => 
+              PHPStan\Type\NullType::__set_state(array(
+              )),
+            ),
+             'normalized' => true,
+          )),
+           'allArrays' => NULL,
+           'nextAutoIndexes' => 
+          array (
+            0 => 3,
+          ),
+           'keyTypes' => 
+          array (
+            0 => 
+            PHPStan\Type\Constant\ConstantStringType::__set_state(array(
+               'objectType' => NULL,
+               'arrayKeyType' => 
+              PHPStan\Type\Constant\ConstantStringType::__set_state(array(
+                 'objectType' => NULL,
+                 'arrayKeyType' => NULL,
+                 'value' => 'COLUMN_NAME',
+                 'isClassString' => false,
+              )),
+               'value' => 'COLUMN_NAME',
+               'isClassString' => false,
+            )),
+            1 => 
+            PHPStan\Type\Constant\ConstantIntegerType::__set_state(array(
+               'value' => 0,
+            )),
+            2 => 
+            PHPStan\Type\Constant\ConstantStringType::__set_state(array(
+               'objectType' => NULL,
+               'arrayKeyType' => 
+              PHPStan\Type\Constant\ConstantStringType::__set_state(array(
+                 'objectType' => NULL,
+                 'arrayKeyType' => NULL,
+                 'value' => 'COLUMN_DEFAULT',
+                 'isClassString' => false,
+              )),
+               'value' => 'COLUMN_DEFAULT',
+               'isClassString' => false,
+            )),
+            3 => 
+            PHPStan\Type\Constant\ConstantIntegerType::__set_state(array(
+               'value' => 1,
+            )),
+            4 => 
+            PHPStan\Type\Constant\ConstantStringType::__set_state(array(
+               'objectType' => NULL,
+               'arrayKeyType' => 
+              PHPStan\Type\Constant\ConstantStringType::__set_state(array(
+                 'objectType' => NULL,
+                 'arrayKeyType' => NULL,
+                 'value' => 'IS_NULLABLE',
+                 'isClassString' => false,
+              )),
+               'value' => 'IS_NULLABLE',
+               'isClassString' => false,
+            )),
+            5 => 
+            PHPStan\Type\Constant\ConstantIntegerType::__set_state(array(
+               'value' => 2,
+            )),
+          ),
+           'valueTypes' => 
+          array (
+            0 => 
+            PHPStan\Type\StringType::__set_state(array(
+            )),
+            1 => 
+            PHPStan\Type\StringType::__set_state(array(
+            )),
+            2 => 
+            PHPStan\Type\UnionType::__set_state(array(
+               'sortedTypes' => true,
+               'cachedDescriptions' => 
+              array (
+                4 => 'string|null',
+              ),
+               'types' => 
+              array (
+                0 => 
+                PHPStan\Type\StringType::__set_state(array(
+                )),
+                1 => 
+                PHPStan\Type\NullType::__set_state(array(
+                )),
+              ),
+               'normalized' => true,
+            )),
+            3 => 
+            PHPStan\Type\UnionType::__set_state(array(
+               'sortedTypes' => true,
+               'cachedDescriptions' => 
+              array (
+                4 => 'string|null',
+              ),
+               'types' => 
+              array (
+                0 => 
+                PHPStan\Type\StringType::__set_state(array(
+                )),
+                1 => 
+                PHPStan\Type\NullType::__set_state(array(
+                )),
+              ),
+               'normalized' => true,
+            )),
+            4 => 
+            PHPStan\Type\StringType::__set_state(array(
+            )),
+            5 => 
+            PHPStan\Type\StringType::__set_state(array(
+            )),
+          ),
+           'optionalKeys' => 
+          array (
+          ),
+           'isList' => false,
+        )),
+      ),
+    ),
     'SELECT column_name, column_default, is_nullable
                 FROM information_schema.columns
                 WHERE table_name = \'1970-01-01\'' => 
diff --git a/tests/default/config/.phpunit-phpstan-dba-mysqli.cache b/tests/default/config/.phpunit-phpstan-dba-mysqli.cache
index 19d2e0704..cd358f89d 100644
--- a/tests/default/config/.phpunit-phpstan-dba-mysqli.cache
+++ b/tests/default/config/.phpunit-phpstan-dba-mysqli.cache
@@ -4138,6 +4138,73 @@
         )),
       ),
     ),
+    'SELECT IFNULL(MAX(eladaid),0)+1 as priority from ak' => 
+    array (
+      'result' => 
+      array (
+        5 => 
+        PHPStan\Type\Constant\ConstantArrayType::__set_state(array(
+           'keyType' => 
+          PHPStan\Type\UnionType::__set_state(array(
+             'sortedTypes' => true,
+             'cachedDescriptions' => 
+            array (
+              2 => '0|\'priority\'',
+            ),
+             'types' => 
+            array (
+              0 => 
+              PHPStan\Type\Constant\ConstantIntegerType::__set_state(array(
+                 'value' => 0,
+              )),
+              1 => 
+              PHPStan\Type\Constant\ConstantStringType::__set_state(array(
+                 'objectType' => NULL,
+                 'arrayKeyType' => NULL,
+                 'value' => 'priority',
+                 'isClassString' => false,
+              )),
+            ),
+             'normalized' => false,
+          )),
+           'itemType' => 
+          PHPStan\Type\IntegerType::__set_state(array(
+          )),
+           'allArrays' => NULL,
+           'nextAutoIndexes' => 
+          array (
+            0 => 1,
+          ),
+           'keyTypes' => 
+          array (
+            0 => 
+            PHPStan\Type\Constant\ConstantStringType::__set_state(array(
+               'objectType' => NULL,
+               'arrayKeyType' => NULL,
+               'value' => 'priority',
+               'isClassString' => false,
+            )),
+            1 => 
+            PHPStan\Type\Constant\ConstantIntegerType::__set_state(array(
+               'value' => 0,
+            )),
+          ),
+           'valueTypes' => 
+          array (
+            0 => 
+            PHPStan\Type\IntegerType::__set_state(array(
+            )),
+            1 => 
+            PHPStan\Type\IntegerType::__set_state(array(
+            )),
+          ),
+           'optionalKeys' => 
+          array (
+          ),
+           'isList' => false,
+        )),
+      ),
+    ),
     'SELECT MAX(adaid), MIN(adaid), COUNT(adaid), AVG(adaid) FROM ada WHERE adaid = 1' => 
     array (
       'result' => 
diff --git a/tests/default/config/.phpunit-phpstan-dba-pdo-mysql.cache b/tests/default/config/.phpunit-phpstan-dba-pdo-mysql.cache
index 0ff658557..6d3f73651 100644
--- a/tests/default/config/.phpunit-phpstan-dba-pdo-mysql.cache
+++ b/tests/default/config/.phpunit-phpstan-dba-pdo-mysql.cache
@@ -4138,6 +4138,73 @@
         )),
       ),
     ),
+    'SELECT IFNULL(MAX(eladaid),0)+1 as priority from ak' => 
+    array (
+      'result' => 
+      array (
+        5 => 
+        PHPStan\Type\Constant\ConstantArrayType::__set_state(array(
+           'keyType' => 
+          PHPStan\Type\UnionType::__set_state(array(
+             'sortedTypes' => true,
+             'cachedDescriptions' => 
+            array (
+              2 => '0|\'priority\'',
+            ),
+             'types' => 
+            array (
+              0 => 
+              PHPStan\Type\Constant\ConstantIntegerType::__set_state(array(
+                 'value' => 0,
+              )),
+              1 => 
+              PHPStan\Type\Constant\ConstantStringType::__set_state(array(
+                 'objectType' => NULL,
+                 'arrayKeyType' => NULL,
+                 'value' => 'priority',
+                 'isClassString' => false,
+              )),
+            ),
+             'normalized' => false,
+          )),
+           'itemType' => 
+          PHPStan\Type\IntegerType::__set_state(array(
+          )),
+           'allArrays' => NULL,
+           'nextAutoIndexes' => 
+          array (
+            0 => 1,
+          ),
+           'keyTypes' => 
+          array (
+            0 => 
+            PHPStan\Type\Constant\ConstantStringType::__set_state(array(
+               'objectType' => NULL,
+               'arrayKeyType' => NULL,
+               'value' => 'priority',
+               'isClassString' => false,
+            )),
+            1 => 
+            PHPStan\Type\Constant\ConstantIntegerType::__set_state(array(
+               'value' => 0,
+            )),
+          ),
+           'valueTypes' => 
+          array (
+            0 => 
+            PHPStan\Type\IntegerType::__set_state(array(
+            )),
+            1 => 
+            PHPStan\Type\IntegerType::__set_state(array(
+            )),
+          ),
+           'optionalKeys' => 
+          array (
+          ),
+           'isList' => false,
+        )),
+      ),
+    ),
     'SELECT MAX(adaid), MIN(adaid), COUNT(adaid), AVG(adaid) FROM ada WHERE adaid = 1' => 
     array (
       'result' => 
diff --git a/tests/default/data/sql-ast-narrowing.php b/tests/default/data/sql-ast-narrowing.php
index fd14482b2..a17fb3dc6 100644
--- a/tests/default/data/sql-ast-narrowing.php
+++ b/tests/default/data/sql-ast-narrowing.php
@@ -54,6 +54,9 @@ public function ifnull(PDO $pdo): void
 
         $stmt = $pdo->query('SELECT ifnull(gesperrt, freigabe1u1) as col from ada');
         assertType('PDOStatement<array{col: int<-128, 127>, 0: int<-128, 127>}>', $stmt);
+
+        $stmt = $pdo->query('SELECT IFNULL(MAX(eladaid),0)+1 as priority from ak');
+        assertType('PDOStatement<array{priority: int, 0: int}>', $stmt); // could be more precise integer range
     }
 
     public function nullif(PDO $pdo): void